CN1143137A - Injecting method for steel rod concrete prefabricated pile end - Google Patents
Injecting method for steel rod concrete prefabricated pile end Download PDFInfo
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- CN1143137A CN1143137A CN 95101176 CN95101176A CN1143137A CN 1143137 A CN1143137 A CN 1143137A CN 95101176 CN95101176 CN 95101176 CN 95101176 A CN95101176 A CN 95101176A CN 1143137 A CN1143137 A CN 1143137A
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- stake
- slip casting
- reinforced concrete
- precast reinforced
- concrete piles
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Abstract
The present invention relates to pilework. After the prefabricated steel reinforced concreste pile is driven via hammer blow or static pressing to designed depth, mortar is injected to pile end through the preset injecting channel in solid pile or drilling formed injection channel in hollow pile. The said pilework can greatly raise the bearing capacity of the prefabricated steel reinforced concrete pile.
Description
The invention belongs to the foundation field.
The precast reinforced concrete piles that sinks in the soil with hammering method or static(al) plunging all belongs to the stake of soil compaction formula.The effect of lateral compression can cause in the adjacent stake and lifts if this stake pilespacing is little, after this stud is squeezed into or be pressed in the soil, stop to hit or static pressure, owing to off-load resilience reason, also can cause pile body on lift.Static pressed pile measured result according to Wenzhou City's 28 floor mansion shows, static pressure finishes and lifts about 4cm on the stake top, back, therefore reduces the supporting capacity of stake.
Stake end at castinplace pile carries out slip casing by pressure, and the similar castinplace pile of its not slip casting of bearing capacity ratio can improve about 0.5-2.5 times, this existing at home and abroad precedent.And being carried out end slip casting, precast reinforced concrete piles yet there are no report.
The present invention has benefited from that the pile end slip casing by pressure improves the enlightenment of bearing capacity and the new process of the precast reinforced concrete piles end slip casting that proposes.Advantage of the present invention is as follows: (1) can be to as mentioned above owing to stop to hit or static pressure causes the stake end soil layer of off-load resilience to carry out slip casing by pressure to improve bearing capacity; (2) in general, carry out slip casing by pressure at layer of sand, gravel layer and powder soil horizon, effect is comparatively obvious, if having the soil layer of suitable slip casing by pressure to exist than deep or superficial part like this, it is long to shorten stake; (3) slip casing by pressure can make cement paste infiltration, and is compacted to a stake end soil layer, also can form enlarged footing on the stake end cement with layer of sand etc., thereby improve bearing capacity; (4) because the effect of slip casing by pressure can reduce the radical or the length of stake, thus the effect of bringing the reduction of erection time and reducing cost.
According to measuring and calculating, compare with the preformed pile of the same type of not slip casting, adopt the bearing capacity of preformed pile of the present invention, can improve 0.5-2.0 doubly.
Describe the present invention's process in detail below in conjunction with accompanying drawing.
Fig. 1 is the pile body sectional view of injecting method for steel rod concrete prefabricated pile end of the present invention.
Fig. 2 is hollow section (2) the stake slip casting access diagram of injecting method for steel rod concrete prefabricated pile end of the present invention.
The solid section (7) of slip casting passage of single-unit reinforcing bar reserve to(for) band mixes Solidifying native prefabricated pile, its main fabrication processing is as follows: set ground (end) mould; Lay framework of steel reinforcement and built-in fitting; Side form and end mould are installed, and the brush interleaving agent; Lay small-bore aerated capsule or special refill; Disturbing concrete; Glue is taken out in venting Capsule or take out special refill; Curing concrete; Form removal.
(use diesel hammer, vibration hammer, steam hammer, hydraulic pressure piling with hammering method Hammer or drop hammer etc.) or with static(al) plunging (application machine formula or fluid pressure type static(al) Pile press machine) taking merogenesis to sink to section by section the method for spreading will be with and reserve the slip casting passage Solid section (7) prefabricated pile when sinking in the soil, take measures to make up and down joint The slip casting channel alignment of stake; When sinking to projected depth, from the stake top to stake end shape The slip casting passage that become to connect can be put in the slip casting passage according to circumstances if do not put and establish Grouting Pipe.
Be the situation of opening pattern hollow section (2) prefabricated pile for the stake end, After with hammering method or static(al) plunging projected depth being sunk in stake (2), Bore the earth pillar (3) that thoroughly enters the stake end with 30 types～～300 type geological drilling rigs And form slip casting passage (4), again will be with the Grouting Pipe (6) of end plug (5) Put into stake, and make end plug (5) be pressed in earth pillar (3) top. The end plug material Material can adopt metal, wooden, concrete or rigid plastics etc.
Just can hold soil layer to carry out slip casing by pressure to stake after the preformed pile in above-mentioned two kinds of cross sections sinks to projected depth and forms the slip casting passage, according to the difference of soil layer geological conditions, grouting pressure can be at 0.3-30N/mm
2(be 3-300kg/cm
2) the interior variation of scope.Pile-end pressure grouting plays infiltration, compacted, consolidation pile end soil layer and forms the effect of the enlarged footing of slurries soil.
After with hammering method or static(al) plunging precast reinforced concrete piles being sunk to projected depth, carry out slip casing by pressure to the stake end by slip casting passage of reserving in the stake (for the situation of solid section (7) preformed pile) or the slip casting passage (for the situation of hollow section (2) preformed pile) that forms by boring.With hammering method precast reinforced concrete piles (comprising RC stake, PC stake and PHC stake) is driven into projected depth.With the static(al) plunging precast reinforced concrete piles (comprising RC stake, PC stake and PHC stake) is pressed into projected depth.Precast reinforced concrete piles comprises ordinary reinforced concrete preformed pile (being the RC stake), prestressed reinforced concrete preformed pile (being the PC stake) and high-strength prestress precast reinforced concrete piles (being the PHC stake).The pile body cross section is the solid section (7) of hollow section (2) or band slip casting passage, outer lateral section is square, rectangle, polygon, circle or arbitrary shape, the preformed pile of solid section (7) is reserved at least one slip casting passage (1) from the stake top to the stake end, adopt small-bore aerated capsule or special refill to form the slip casting passage when the single-unit stake is made, whether Grouting Pipe is set in the slip casting passage should be decided according to engine request.After the preformed pile of hollow section (2) sinks to projected depth, form slip casting passage (4) by boring, and in slip casting passage (4), put into the Grouting Pipe (6) of band edge plug (5).The slurries that inject can mix additive such as flyash, expansion agent, water reducing agent, early strength admixture and retarding agent according to matter condition different mining on the stratum with cement paste, cement mortar or at above-mentioned slurries.Grouting pressure can be according to soil layer also matter condition difference, at 0.3-30N/mm
2(be 3-300kg/cm
2) the interior variation of scope.The stake end can be made into opening, semi-closed port or the form of remaining silent.
Claims (10)
1, a kind of process of precast reinforced concrete piles end slip casting, it is characterized in that: after with hammering method or static(al) plunging precast reinforced concrete piles being sunk to projected depth, carry out slip casing by pressure to the stake end by slip casting passage of reserving in the stake (for the situation of solid section (7) preformed pile) or the slip casting passage (for the situation of hollow section (2) preformed pile) that forms by boring.
2, by the process of the described precast reinforced concrete piles of claim 1 end slip casting, it is characterized in that precast reinforced concrete piles (comprising RC stake, PC stake and PHC stake) being driven into projected depth with hammering method.
3, by the process of the described precast reinforced concrete piles of claim 1 end slip casting, it is characterized in that precast reinforced concrete piles (comprising RC stake, PC stake and PHC stake) being pressed into projected depth with the static(al) plunging.
4, by the process of the described precast reinforced concrete piles of claim 1 end slip casting, it is characterized in that precast reinforced concrete piles comprises ordinary reinforced concrete preformed pile (being the RC stake), prestressed reinforced concrete preformed pile (being the PC stake) and high-strength prestress precast reinforced concrete piles (being the PHC stake).
5, press the process of the described precast reinforced concrete piles of claim 1 end slip casting, it is characterized in that the pile body cross section is the solid section (7) of hollow section (2) or band slip casting passage, outer lateral section is square, rectangle, polygon, circle or arbitrary shape
6, press the process of the described precast reinforced concrete piles of claim 1 end slip casting, the preformed pile that it is characterized in that solid section (7) is reserved at least one slip casting passage (1) from the stake top to the stake end, adopt small-bore aerated capsule or special refill to form the slip casting passage when the single-unit stake is made, whether Grouting Pipe is set in the slip casting passage should be decided according to engine request.
7, press the process of the described precast reinforced concrete piles of claim 1 end slip casting, after the preformed pile that it is characterized in that hollow section (2) sinks to projected depth, form slip casting passage (4) by boring, and in slip casting passage (4), put into the Grouting Pipe (6) of band edge plug (5).
8,, it is characterized in that the slurries that inject can mix additive such as flyash, expansion agent, water reducing agent, early strength admixture and retarding agent according to stratum soil condition different mining with cement paste, cement mortar or at above-mentioned slurries by the process of the described precast reinforced concrete piles of claim 1 end slip casting.
9, by the process of the described precast reinforced concrete piles of claim 1 end slip casting, it is characterized in that grouting pressure can be according to soil layer geological conditions difference, at 0.3-30N/mm
2(be 3-300kg/cm
2) the interior variation of scope.
10,, it is characterized in that the stake end can be made into opening, semi-closed port or degree of lip-rounding formula by the process of the described precast reinforced concrete piles of claim 1 end slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101176 CN1042158C (en) | 1995-01-19 | 1995-01-19 | Injecting method for steel rod concrete prefabricated pile end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101176 CN1042158C (en) | 1995-01-19 | 1995-01-19 | Injecting method for steel rod concrete prefabricated pile end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1143137A true CN1143137A (en) | 1997-02-19 |
| CN1042158C CN1042158C (en) | 1999-02-17 |
Family
ID=5073820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95101176 Expired - Fee Related CN1042158C (en) | 1995-01-19 | 1995-01-19 | Injecting method for steel rod concrete prefabricated pile end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042158C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410143A (en) * | 2013-07-26 | 2013-11-27 | 上海岩土工程勘察设计研究院有限公司 | Construction method for improving bearing capacity of hollow pile foundation |
| CN103790160A (en) * | 2014-01-17 | 2014-05-14 | 上海中锦建设集团股份有限公司 | Method for pulling out structural steel and conducting grouting through SMW construction method |
| CN104594357A (en) * | 2015-01-19 | 2015-05-06 | 赵连平 | Grouting device after statically pressing or hammering concrete precast tubular pile base and grouting method |
| CN106120714A (en) * | 2016-08-22 | 2016-11-16 | 上海岩土工程勘察设计研究院有限公司 | A kind of device improving hollow pile bearing capacity and using method thereof |
-
1995
- 1995-01-19 CN CN 95101176 patent/CN1042158C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410143A (en) * | 2013-07-26 | 2013-11-27 | 上海岩土工程勘察设计研究院有限公司 | Construction method for improving bearing capacity of hollow pile foundation |
| CN103790160A (en) * | 2014-01-17 | 2014-05-14 | 上海中锦建设集团股份有限公司 | Method for pulling out structural steel and conducting grouting through SMW construction method |
| CN103790160B (en) * | 2014-01-17 | 2015-09-09 | 上海中锦建设集团股份有限公司 | A kind of SMW engineering method profile steel pulling and grouting |
| CN104594357A (en) * | 2015-01-19 | 2015-05-06 | 赵连平 | Grouting device after statically pressing or hammering concrete precast tubular pile base and grouting method |
| CN106120714A (en) * | 2016-08-22 | 2016-11-16 | 上海岩土工程勘察设计研究院有限公司 | A kind of device improving hollow pile bearing capacity and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1042158C (en) | 1999-02-17 |
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